Shock-absorber for vehicles.



R. E. HART.

SHOCK ABSORBBR FOB. VEHICLES. APPLIUATION FILED Nov.15, 1911,

1,041,276. Patented Oct. 15, 1912.'

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ARAY E. HART, 0F BATTLE CREEK, MICHIGAN.

SHOCKeABSGRBER FR VEHICLES.

Specification of Letters Patent.

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ToaZZ 'whom t may concern Be it known that I, RAY E. HART, a citizen of the United States, residing at Battle Creek, in the county ot' Calhoun and State of Michigan, have invented certain new and useful Improvements in Shock-Absorbers for Vehicles, of which the following is a specification.

The present invention more particularly relates to means for gradually reducingl the resiliency of vehicle springs and to overcome their liability to fracture, either when distended or compressed.

It'conteinplates the'attachment of a piv otally suspended double lever, one ai'in ott which is attached to the vehicle body proper and the other to the axle or spring opposite to the body, and means arranged at the axle or pivot of the levers whereby, by the spreading or collapsing ot said levers beyond a predetermined limit, said means will afford a cushion coperative with the vehicle spring, and lessen the shoclr imparted to said spring occasioned from any means, either at recoil or rebound.

It also has for its object, togprovide an article for the purpose, whereby the saine can be readily adjusted'to attach to vehicles of varying heights between axle and body, and also to increase or diminish the resili ency of the parts.

It also contemplates means whereby the pivotal levers will oscillate on a common pivot in true arcs; whereby the same will be symmetrical indesign, economical to manufacture, and positive in operation.

These and other objects will hereinafter appear in the following specification.y and be particularly7 set forth in the appended claims. v

In the drawings forming a part of this specification, Figure l,y is a side view of in); improved shock absorber as applied to a ve hicle. `Fig. 2, is a detail view of one o the oscillating levers with a cam race fi ined therewith. Fig. 3, is a detail view ctt the Opposite lever. Fig. 4l, is a detail plai lvicw of the lever shown in Fig. 3 with the ortable cam race and spring receiving t inble inserted in operative position. Fig. is a semi-cross section .of the assembled levice, and Fig. 6, is a perspective view of th; ipertable friction cam.

Like marks of reference refer toliorre-v spending parts throughout the ditl'erent views, in whichw A, and B, are the main component fra-me sect-ions of the device, the section A, having a flange or rim extension I, adapted to telescope within the rim 2, of the part B, both sections being axially apertured as at 3, and il, respectively, and when in operative contact prevented trom displacement by means ot a bolt 5. The sect-ions have arms C, and D, respectively, the arms at their outer free extremities being pivotally attached to the running gear ot a vehicle iii the ordinary manner for attaching friction devices tor a like purpose. At intervals ot space within the rim of the section fr, seniicircular longitudinally arranged slots, or grooves (i, are formed. These grooves by preference are equally spaced trios, arranged in units of equal triangular spaced distances.

The. section B, Yhas a triangularly arranged cani-faced race 7. concenliicwithin the rim 2, and so spaced that the rim l, ot the section may play freely tliereinbetween when in operative position, as shown in Fig. 5. y

ldlithin and between the sections A, and B, and seated upon the cani race 7, a pertable ring-shaped cani 8, is' placed.-` This caro has a tace corresponding in shape to the cam race 7, and by 'preference has a peripheral rini 9,tiie depth et the cams working pitch. l/Vhen the faces of the respective cams are nested, the rim of the cam 8, telescopes over the outside ot the cam 7, between the respective cam and the rim 1. The back of the cam S, is flat. and it has a groove l0, (Fig. 5,) intersecting i: v center openin, within which the rim ll, of a spring receiving thiinble l2, is seated. The thiinble has a. central vaperture 13, at its indrawn end vthroiigl'i which the clainpingibolt 5., is passed when in working position.- The tliiinble is titted through the Cain S, with the rim ll, seated within the groove l0, thereof, and opens toward the section said section haviig an oliset, or countersuiik portion 13', oI receive theouter end of the rim ll, .when the cams are fully extended. Viithin the thiinble and bearing against the section Af, a coil spring 14;, is fitted; the bolt 5,r passing successively through the section A., spring as shown.

le, thirrible '12, and the secti.on l,

.16, loosely, and permit said cam to easily Work up and down within the' rim when in operative position. The object 'of the studs is manifold; they permit the cam to freely work, or telescope within the rim l, and. at the same time retain a grip rotatable therewith, in the operation of the lever D. The studs further perform the service of regulating the attachment of the operative parts to a vehicle, as by shifting them within the grooves 6, of the rim 1, the arms C, and D,

are closed together or thrown apart as the occasion may requn'e; for 1nstance,^assum` ing that the cams 7, and 8, when the arms are arran ed as shown in Fig. 1, were required to' e either spread farther apart, or closed nearer together, in ,-making the' attachment to ya vehicle; by ,arrangingthe studs 16, either to the 'right or to the left of a .center position collectively, as the oceasioninight requlre, and carrying the cam 8 so that the' grooves 15, thereof would interlock with said studs, the interlocking of the '4 parts would cause the same to move on the .faees of the cam faces when full '-nterflocking 'contact ride upon t eir flat same pivotal center. By the peculiar arrangement of the parts, the broadened surout of tened extremitieswithout exerting additional tension on the spring 14, the spring itselfl when thus extended affording a maximum of resiliency and relieving theparts of the de vice from strain or breakage'by abrupt engagement, andpermittin the springs 'of a vehicle to gradually cushion in their action.

From the fdregoing description, taken in connection with the drawings, it is believed la further explanation 'of its workings and advantages will 'not be necessary.

Having therefore, set. forth the object and advantages of my invention, what I claim, and desire to secure by Letters Patent, is

l. In a shock absorber comprising oppolsitely disposed hinged sections pivotallv attached at their outer extremities to the body lbers and a correspondingly shaped portable and running gear of ,a vehicle respectively, one of said sections having a. fixed cam race, the opposite section having a-rim with detachable interiorly, arranged studs, a portable cam race within said rim between said sections, said raceengaging with said' rim studs and prevented from rotary movement therein but telescopically movable therewith, a thimble fitted within said cam. race and movable therewith, a spring fitted within said thimble bearing against the indrawn end thereof and at the opposite end against the section having the rim with detachable interiorly-arranged studs, and a bolt axially passing through the assembled parts, as and for the purpose set forth.

2. In a shock absorber, 'the combination with two supporting members pivotally hinged and telescopically fitted to oscillate in true arcs, a concentrically disposed -triangular cam formed within one of said memintermeshing cam fitted within the othe., member, detachable studs fitted within grooves between the periphery of the portable cam and the inner rim of its incasing member, whereby said cam cannot rotate within said rim but be telescopically movable therein, and whereby the angularity of said pivotal members may be changed on their axes by the shifting of the movable studs, substantially as set forth and for the purpose set forth 3. In a shock absorber, the combination with two supporting members pivotally hinged `1nd telescopically fitted to oscillate in true arcs, a eoncentrically-dispcsedtriangular cam formed within one of said mem'- bers and a correspondingly-shaped portable intermeshing cam fitted within the other 4 member, detachable studs fitted within grooves between the periphery. of the port- 100 able cam and the inner rim of the incasing member, whereby the angularity of the pivotal members may be shifted on their axes and whereby said members may be longitudinally movable but non-rotatable, a thimble 105 fitted within said portable cam, a spring fitted within' said thimble bearing against thf indrawn end thereof and the member without a fixed cam and a. bolt axially passing through the, assembled parts, as and for 110 the purpose set forth.

HART. Nitnessesz y l WALTER I-l'. Noni'i1,"{ Y CLARENCE E. MUInnnAD. 

